====================================== | [ 1150.037263] #6: ffffffff87f678c0 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:5729 net/core/dev.c:5801) | [ 1150.037761] #7: ffffffff87f678c0 (rcu_read_lock){....}-{1:2}, at: ip_local_deliver_finish (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/ipv4/ip_input.c:232) | [ 1150.038258] | [ 1150.038258] stack backtrace: [ 1150.038910] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1150.039529] Call Trace: [ 1150.039678] [ 1150.039822] dump_stack_lvl (lib/dump_stack.c:108) [ 1150.040034] __lock_acquire (kernel/locking/lockdep.c:5138) [ 1150.040279] ? sk_filter_trim_cap (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/filter.c:151) [ 1150.040545] lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) [ 1150.040795] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) [ 1150.041010] ? sk_filter_trim_cap (net/core/filter.c:165) [ 1150.041281] _raw_spin_lock_nested (kernel/locking/spinlock.c:379) [ 1150.041563] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) [ 1150.041822] tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) [ 1150.042040] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) [ 1150.042301] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 1150.042582] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) [ 1150.042862] netif_receive_skb (net/core/dev.c:5742 net/core/dev.c:5801) [ 1150.043085] tcf_mirred_to_dev (net/sched/act_mirred.c:329) act_mirred [ 1150.043438] tcf_mirred_act (net/sched/act_mirred.c:461 (discriminator 2)) act_mirred [ 1150.043739] ? tcf_skbedit_act (net/sched/act_skbedit.c:51 (discriminator 3)) act_skbedit [ 1150.044021] tcf_action_exec (./include/net/tc_wrapper.h:130 net/sched/act_api.c:1100 net/sched/act_api.c:1074) [ 1150.044274] fl_classify (net/sched/cls_flower.c:345) cls_flower [ 1150.044591] ? __bfs (kernel/locking/lockdep.c:1787) [ 1150.044798] ? check_irq_usage (kernel/locking/lockdep.c:2823) [ 1150.045045] ? __bfs (kernel/locking/lockdep.c:1784 (discriminator 1)) [ 1150.045270] ? check_path.constprop.0 (kernel/locking/lockdep.c:2145) [ 1150.045558] ? check_noncircular (kernel/locking/lockdep.c:2172) [ 1150.045826] ? __bfs (kernel/locking/lockdep.c:1787) [ 1150.046030] ? __lock_acquire (kernel/locking/lockdep.c:5133 (discriminator 1)) [ 1150.046282] tcf_classify (./include/net/tc_wrapper.h:197 net/sched/cls_api.c:1734 net/sched/cls_api.c:1830) [ 1150.046509] tc_run (net/core/dev.c:3945) [ 1150.046719] __dev_queue_xmit (net/core/dev.c:4069 net/core/dev.c:4301) [ 1150.046999] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 1150.047217] ? eth_header (net/ethernet/eth.c:85) [ 1150.047451] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) [ 1150.047690] ? __ip_queue_xmit (net/ipv4/ip_output.c:535) [ 1150.047949] __ip_queue_xmit (net/ipv4/ip_output.c:535) [ 1150.048177] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) [ 1150.048429] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 1150.048661] tcp_write_xmit (net/ipv4/tcp_output.c:2792) [ 1150.048915] ? tcp_current_mss (./include/net/dst.h:216 net/ipv4/tcp_output.c:1864) [ 1150.049149] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) [ 1150.049410] tcp_rcv_state_process (net/ipv4/tcp_input.c:5654 net/ipv4/tcp_input.c:6881) [ 1150.049695] ? lock_acquire (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756 kernel/locking/lockdep.c:5719) [ 1150.049903] ? tcp_v4_rcv (./include/linux/skbuff.h:1619 ./include/net/tcp.h:2512 net/ipv4/tcp_ipv4.c:2327) [ 1150.050138] ? tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) [ 1150.050361] ? lock_is_held_type (kernel/locking/lockdep.c:5495 kernel/locking/lockdep.c:5825) [ 1150.050582] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1930) [ 1150.050813] tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2330) [ 1150.051021] ? process_backlog (net/core/dev.c:5978 (discriminator 2)) [ 1150.051254] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) [ 1150.051510] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 1150.051791] __netif_receive_skb_one_core (net/core/dev.c:5542 (discriminator 4)) [ 1150.052066] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:5985) [ 1150.052281] __napi_poll.constprop.0 (net/core/dev.c:6584) [ 1150.052552] net_rx_action (net/core/dev.c:6655 net/core/dev.c:6786) [ 1150.052769] __do_softirq (kernel/softirq.c:553) [ 1150.052966] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) [ 1150.053188] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14)) [ 1150.053488] [ 1150.053632] [ 1150.053791] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649) [ 1150.054072] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) [ 1150.054317] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 2d 40 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 All code ======== 0: 4c 01 c7 add %r8,%rdi 3: 4c 29 c2 sub %r8,%rdx 6: e9 72 ff ff ff jmp 0xffffffffffffff7d b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: f3 0f 1e fa endbr64 1f: 66 90 xchg %ax,%ax 21: 0f 00 2d d3 2d 40 00 verw 0x402dd3(%rip) # 0x402dfb 28: fb sti 29: f4 hlt 2a:* fa cli <-- trapping instruction 2b: c3 ret 2c: cc int3 2d: cc int3 2e: cc int3 2f: cc int3 30: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 37: 00 00 00 00 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop Code starting with the faulting instruction =========================================== 0: fa cli 1: c3 ret 2: cc int3 3: cc int3 4: cc int3 5: cc int3 6: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 00 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop [ 1150.055297] RSP: 0018:ffffa8fb400b3ee8 EFLAGS: 00000242 [ 1150.055608] RAX: 0000000000470bad RBX: ffff8f4a8133c280 RCX: 4000000000000000 [ 1150.055994] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff865a8863 [ 1150.056382] RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000001 [ 1150.056812] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 1150.057227] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1150.057680] ? do_idle (kernel/sched/idle.c:171 kernel/sched/idle.c:312) [ 1150.057901] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:98) [ 1150.058174] do_idle (kernel/sched/idle.c:171 kernel/sched/idle.c:312) [ 1150.058357] ? do_idle (kernel/sched/idle.c:238) [ 1150.058581] cpu_startup_entry (kernel/sched/idle.c:409 (discriminator 1)) [ 1150.058793] start_secondary (arch/x86/kernel/smpboot.c:336) Finger prints: dump_stack_lvl:__lock_acquire:lock_acquire:_raw_spin_lock_nested